/**
 * 
 */
package design_pattern.facade.security;

/**
 * @author linzq
 *
 */
public class Light {

  public void turnOn() {
    System.out.println("开灯。");
  }

  public void turnOff() {
    System.out.println("关灯。");
  }

  public void changeLight() {
    System.out.println("更换灯泡。");
  }
}
